Step 9: calculate distortion between original and coded images: >>> imgdist lenna.pgm.gz lenna.vq.4D2 56.pgm The distortion between files lenna.pgm.gz and lenna.vq.4D256.pgm is: 13.841091 (MSE) ...

napari is a free, open-source and extensible image viewer for arbitrarily complex (‘n-dimensional’) data that is tightly coupled to the Python programming language (see napari.org).